Vector flow fields. They are a graphics system that is used to indicate the flow of both mechanical and EM waves. The angle and length of the tiny arrows indicate the direction and the strength of the flow. This can either be used to simulate wind, or water or magnetic attraction and many other things.

>>7789038
it's work, bro

>>7789047
What the fuck is n EM wave

line integral of a vector field

gif pretty much explains it

>>7789055
Never mind I found it

>>7789055
Electromagnetic wave. Although I didn't look at the gif and just commented on the image so this anon is more accurate : >>7789057